326561243 has 4 divisors (see below), whose sum is σ = 331914768. Its totient is φ = 321207720.

The previous prime is 326561231. The next prime is 326561251. The reversal of 326561243 is 342165623.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 326561243 - 2⁸ = 326560987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (326560243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2676671 + ... + 2676792.

It is an arithmetic number, because the mean of its divisors is an integer number (82978692).

Almost surely, 2^326561243 is an apocalyptic number.

326561243 is a deficient number, since it is larger than the sum of its proper divisors (5353525).

326561243 is an equidigital number, since it uses as much as digits as its factorization.

326561243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5353524.

The product of its digits is 25920, while the sum is 32.

The square root of 326561243 is about 18071.0055890645. The cubic root of 326561243 is about 688.6336069446.

The spelling of 326561243 in words is "three hundred twenty-six million, five hundred sixty-one thousand, two hundred forty-three".